Abstract
Drought is an important abiotic stress that hampers the growth of plants by inhibiting photosynthesis resulting in major crop losses. Silicon is known for its role to alleviate impact of various abiotic stresses in plants. In the present study, drought sensitive wheat variety HI-1544 was subjected to drought stress (DS) by withholding irrigation. The aim of this study was to evaluate the impact of SiO2 nanopriming in protecting photosynthesis, particularly photosystems (PSI and PSII), under drought condition. DS significantly reduced the quantum yield of PSII (YII) and PSI (YI) in unprimed drought stressed (UP+DS) plants but non-significant reduction was observed in NP+DS wheat plants. Likewise a severe impairment in the electron transport rate of PSII and PSI (ETRII and ETRI) in UP+DS was noticed as compared to NP+DS plants. Among energy dissipation parameters, regulated and non-regulated energy dissipation [Y(NPQ) and Y(NO) respectively] showed prominent increase in UP+DS plants when compared to NP+DS wheat plants. Decrease in YI was accompanied by significant increase in donor Y(ND) and acceptor side Y(NA) limitation of PSI in UP+DS plants. These parameters were less affected in NP+DS wheat plants. A remarkable inhibition in the oxidation reduction kinetics of P700 was observed in UP+DS plants while it were less affected in NP+DS wheat plants. The data suggests that the impact of drought stress (DS) was more prominent on PSII than PSI. SiO2 nanopriming conferred more protection to PSII complex, thereby improving photosynthetic efficiency under DS.
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Claims 7
Claim · model-written summary
Drought stress significantly reduced the quantum yield of PSII and PSI in unprimed wheat plants.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- drought stress (DS)e0
- Outcome
- quantum yield of PSII (YII) and PSI (YI)e1
- Direction
- reducede1
- Qualifier
- in unprimed drought stressed (UP+DS) plantse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the present study, drought sensitive wheat variety HI-1544 was subjected to drought stress (DS) by withholding irrigation”
e1“DS significantly reduced the quantum yield of PSII (YII) and PSI (YI) in unprimed drought stressed (UP+DS) plants but non-significant reduction was observed in NP+DS wheat plants”
Claim · model-written summary
SiO2 nanopriming gave more protection to the PSII complex under drought stress than unprimed plants.
- Taxon
- wheatTriticum aestivume0
- Treatment
- SiO2 nanopriminge7
- Outcome
- protection to PSII complexe7
- Direction
- moree7
- Comparator
- unprimed drought stressed (UP+DS) plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the present study, drought sensitive wheat variety HI-1544 was subjected to drought stress (DS) by withholding irrigation”
e1“DS significantly reduced the quantum yield of PSII (YII) and PSI (YI) in unprimed drought stressed (UP+DS) plants but non-significant reduction was observed in NP+DS wheat plants”
e7“SiO2 nanopriming conferred more protection to PSII complex, thereby improving photosynthetic efficiency under DS”
Claim · model-written summary
Regulated and non-regulated energy dissipation, Y(NPQ) and Y(NO), showed a prominent increase in UP+DS wheat plants compared with NP+DS wheat plants.
- Taxon
- wheatTriticum aestivume0
- Treatment
- UP+DSe3
- Outcome
- regulated and non-regulated energy dissipatione3
- Direction
- prominent increasee3
- Comparator
- NP+DS wheat plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the present study, drought sensitive wheat variety HI-1544 was subjected to drought stress (DS) by withholding irrigation”
e3“Among energy dissipation parameters, regulated and non-regulated energy dissipation [Y(NPQ) and Y(NO) respectively] showed prominent increase in UP+DS plants when compared to NP+DS wheat plants”
Claim · model-written summary
Decrease in YI was accompanied by a significant increase in donor side Y(ND) and acceptor side Y(NA) limitation of PSI in UP+DS plants.
- Taxon
- wheatTriticum aestivume0
- Treatment
- UP+DSe4
- Outcome
- donor Y(ND) and acceptor side Y(NA) limitation of PSIe4
- Direction
- significant increasee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the present study, drought sensitive wheat variety HI-1544 was subjected to drought stress (DS) by withholding irrigation”
e4“Decrease in YI was accompanied by significant increase in donor Y(ND) and acceptor side Y(NA) limitation of PSI in UP+DS plants”
Claim · model-written summary
Oxidation reduction kinetics of P700 were remarkably inhibited in UP+DS plants compared with NP+DS wheat plants.
- Taxon
- wheatTriticum aestivume0
- Treatment
- UP+DSe5
- Outcome
- oxidation reduction kinetics of P700e5
- Direction
- remarkable inhibitione5
- Comparator
- NP+DS wheat plantse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the present study, drought sensitive wheat variety HI-1544 was subjected to drought stress (DS) by withholding irrigation”
e5“A remarkable inhibition in the oxidation reduction kinetics of P700 was observed in UP+DS plants while it were less affected in NP+DS wheat plants”
Claim · model-written summary
The authors suggest that drought stress had a more prominent impact on PSII than on PSI.
- Taxon
- wheatTriticum aestivume0
- Treatment
- drought stress (DS)e6
- Outcome
- impact of drought stress (DS)e6
- Direction
- more prominente6
- Qualifier
- on PSII than PSIe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the present study, drought sensitive wheat variety HI-1544 was subjected to drought stress (DS) by withholding irrigation”
e6“The data suggests that the impact of drought stress (DS) was more prominent on PSII than PSI”
Claim · model-written summary
Electron transport rate of PSII and PSI showed severe impairment in UP+DS plants compared with NP+DS plants.
- Taxon
- wheatTriticum aestivume0
- Treatment
- UP+DSe2
- Outcome
- electron transport rate of PSII and PSI (ETRII and ETRI)e2
- Direction
- severe impairmente2
- Comparator
- NP+DS plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the present study, drought sensitive wheat variety HI-1544 was subjected to drought stress (DS) by withholding irrigation”
e2“Likewise a severe impairment in the electron transport rate of PSII and PSI (ETRII and ETRI) in UP+DS was noticed as compared to NP+DS plants”
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